Means for forming threaded openings in castings.



J. BE L. MEANS FOR FORMING THEE OPENINGS IN GASTINGS. APPLIUATION FILEDNOV. 8, 1907.

914,915. Patented Mar. 9, 19%.

WITNESSES INVEHTOR I Joaapfiaaei,

s'rn'r as serene: orFioE.

JOShPH BEE-DELL, OF REN'SSELAER. NEW YORK, ASSIGNOR TO BURDICK & SON, OF

ALBANY,

NEW YORK. A (JORlURAPION OF NEW YORK.

MEANS FOR FORMINGTHREADED-OPENINGS IN CASTING.

Specification of Letters Patent.

Batented March 9, 1909.

Application filed November 8. 1907. Serial No. 401,333.

To (171 whom. it may concern:

Be it known that I, JosEPn BEDELL, a citizen ofthe United States,residing at Ronsselaer, in the county of Reusselaer and State of NewYork, have invented. certain new and useful Improvements in Means forForming Threaded Openings in'Castings, oi which the following is aspecification.

My invention relates to improvements in means for forming threadedopenings in :astings.

With certain castings it is difficult to thread an opening in particularplaces because of the inconvenience of using a drill and a tap.Furthermore in order to reduce the cost of the castings having threadedopenihgs, I have found it expedient and practical to insert what I shallhereinafter term a shell formed by a piece of appropriately shaped wire,and placing it in the mold, and fusing it with the metal forming thecasting. may be formed from wire, ed to receive a screw or bolt properlyshap particular pitch, and is supported in aving a the mold 1n a mannerbest suited for the convenience of the artisan.

The invention relates to the details of construction and arrangement ofparts to he hereinafter referred to and particularly pointed out in theclaims.

In the drawingsFigure 1 is a vertical section of my invention inconnection with a screw. Fig: 2 is a detailsectional perspective view ofthe improved shell. Fig. 3 is a detail section of a shell formedinteriorly to correspond with an ordinary bolt thread. Fig. 4 is a viewof a slightly different form of my invention. Fig. 5 is a plan view ofthe same. Fig. 6 is a perspective view of a further form of theinvention. Figs. 7 and 8, illustrate side and top views respectively ofa shell andsuppprt formed from a single piece of metal.

Broadly stated the invention comprehends a plurality of spirals forminga shell to be embedded in a casting to providefi'a screw thread, but inaddition I have also devised special means for holding the shell inposition when casting, which means with the shell becomes a part of thefinished product.

The numeral 1, indicates a spirally arranged shell, somewhat inthenature of a close spring, the convolutions of which are arranged ajacent each other and are of a determinate pite'h i l i i i I i 1However, it is advisable to insure accuracy,

to provide a support, and as it is possible to arrange this feature in anumber of different ways, I have shown several. For instance in Fig. 4,theupper art of the" shell 1, is provided with a thin siieet metal cap,3, having a tubular portion 4, and an overhanging flange 5, with spurs6. The cap serves as a means for holding the shell, and the spurs becomeemhedded in the sand.

The form shown in Figs. 7 and 8,-is similar to the construction shown inFi' s 4 and 5, except that the overhanging ange 6, is formed from thesame iece' of metal as the shell. After the shell isof the desiredlength, the wire is bent into a series of flat coils at right angles tothe disposition of those of said shell, as clearly shown in the drawing.I

For certain shells, it is essential that an elongated support beprovided, and to meet this contingency, I have provided a support, suchas shown in Fig. 6. In this form of mv -.im-'ention, 7, indicates asheet metal band bent at SS, to provide outwardly extending members 9-9,having openings ill--10, in which a tubular member is mounted. Thetubular member may have openings 11, to expose the outer side of theshell, and through which the molten metal forming the casting will (low.The molten metal flowing into the 0 enings will contact with the shelland fuse thereto.

in use the shell is placed in a suitable recess inv the pattern, and ispacked with core composition, and when the pattern is removed, the shellremains supported in the mold, and as has been indicated heretofore theshell may or may not have the support, this depending altogether on thecircumstances as to the character of thread desired, the length of thesame, and other incidental features known to the trade. molten metal ispoured into the mold, it flows around the shell and support, and fuses,forming practically a unit, and producing a thread in the casting,without the necessity of drilling and tapping as now practiced.

If it is found desirable, the innerface ofv hen the the wire from whichthe shell is formed may be shaped to accommodate threads of particularshapes, as shownin Fig. 3, and ob-' viously in winding the wire thepitch may be .altered to suit the screw or bolt which is to cooperatewith the thread.

e Inasmuch as many minor changes may be made without departing from thespirit and sco e of my improvement, I desire it to be on erstood that Ireserve the right to such as come within the purview of the invention.

Having now described my invention,what I. claim is 1. An improvedarticle of manufacture, designed for forming threaded openings incastlngs, comprisin a shell formed from a singlestrip of meta in aseries of coils, the

,inner diameter of the coils being beveled to accommodate a thread of abolt or screw.

' 2. An article of manufacture designed for forming threaded openings incastings comprising a shell formed of a series of coils, and

a thin metal sup ort on the outside of the shell for holding t e latter.

3. An article of manufacture designed for forming threaded openings ,incastings comprisin a shell formed of a single piece of metal by coilingto provide a threaded 0 ening, a su port for the shell, said support aving a tu ular extension and a flange extend ing outwardly from thetubular extension.

4. An article of manufacture, designed for forming threaded openings incastings, com-- prising a shell formed of a single piece of metal bycoiling to provide a threaded opening-and a flange at one end of theshell, the shell and flange bein formed of metal which will fuse withthe mo ten metal.

5. An article of manufacture, designed for forming threaded openings incastings, comprising a shell formed of a continuous iece of metal toTOVIdQ a series of coils, an a support for. t e shell, said supportcomprising a thin sheet of metal bent to provide extended 1 members, anda tubular extension connecting the members and enga ing the shell.

6. As an im roved artic e of manufacture, designed for orming threadedopenings in castings, a shell formed of a continuous piece of metal toproduce a series of coils, and a support for the shell, said supportcomprising a membef connected by a tubular extension which engages theshell, said extension being formed with openings to expose a part of theshell.

7. As an article of manufacture, designed for forming threaded openingsin castings, a

' shell formed of a series of coils,.a support fltherefor, s'aid supporthaving .a tubular extension formed with openings to expose the shell.

8. An article forming threaded openings in castings, comprising a shellformed of a series of coils, av

support therefor, and a rejection extending ,beyond the outer face 0 thesupport.

9. As a new article of manufacture, designed for forming threadedopenings in castings, a shell formed of a series of coils, a support onthe outside of the shell, said support aving a series of openings toexpose the shell.

In testimony whereof I aflix my signature in presence of two Witnesses.

. JOSEPH BEDELL.

Witnesses:

R. WALLACE MoK-EE, ANDREW -W. HAHN.

of manufacture designed for Y

